


Non-Precipitation Warnings / Watches / Advisories
Issued by NWS Flagstaff, AZ
Issued by NWS Flagstaff, AZ
693 WWUS75 KFGZ 130738 NPWFGZ URGENT - WEATHER MESSAGE National Weather Service Flagstaff AZ 1238 AM MST Wed Aug 13 2025 AZZ006-140200- /O.CON.KFGZ.XH.W.0004.000000T0000Z-250815T0300Z/ Grand Canyon Country- Including the cities of North Rim, Supai, and Grand Canyon Village 1238 AM MST Wed Aug 13 2025 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST THURSDAY BELOW 4000 FEET... * WHAT...Dangerously hot conditions below 4000 feet, with daytime temperatures ranging from 102 degrees at Havasupai Gardens, to 112 degrees at Phantom Ranch. * WHERE...Lower elevations of the Grand Canyon. * WHEN...Until 8 PM MST Thursday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... This warning is reserved for only the hottest days of the year and is issued when temperatures are expected to rise to dangerous levels. Day hikers on Bright Angel Trail should descend no farther than 1 1/2 miles from the upper trailhead. Between the hours of 10 AM and 4 PM, hikers should be out of the canyon or at Havasupai Gardens or Bright Angel campgrounds, physical activity is discouraged. All hikers should have adequate gear, including a wide-brimmed hat, sunscreen, salty snacks, sufficient water, and electrolyte mix. Doubling your calorie intake helps maintain your energy. Hike smart. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed. && $$ AZZ005-140200- /O.CON.KFGZ.XH.W.0004.250813T1800Z-250814T0200Z/ Marble and Glen Canyons- Including the cities of Page and Lees Ferry 1238 AM MST Wed Aug 13 2025 /138 AM MDT Wed Aug 13 2025/ ...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 11 AM MST /NOON MDT/ THIS MORNING TO 7 PM MST /8 PM MDT/ THIS EVENING... * WHAT...Dangerously hot conditions, with temperatures up to 105 expected. * WHERE...Marble and Glen Canyons, including Lake Powell and Page. * WHEN...From 11 AM MST /noon MDT/ this morning to 7 PM MST /8 PM MDT/ this evening. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed. && $$ Humphreys